More Realtime

@dshaw

MOAR Realtime!

@dshaw

More Socket.io

@dshaw

Way More Redis!

@dshaw

Socket.io RedisStore

That's awesome.

Socket.io RedisStore

You know what's cooler than one process
(or even a cluster of processes)?

A cluster of servers.

Socket.io RedisStore

• Lightweight key/value persistence in Redis.

  
  io.sockets.on('connection', function(socket) {
    var nick = 'dshaw'
    socket.set('nickname', nick, function() {
      socket.emit('nickname', nick)
    })
  })
                

• Inter-process dispatch.

  
      io.sockets.emit('newuser', { nick: nick });
                

Socket.io RedisStore

Cool. But how?

Up until today, YOYO!

RedisStore Docs

github.com/dshaw/RedisStore-Docs

Socket.io-Announce

Network connected realtime services

Traditional Socket.io

Tied to a web server

Applies to the old school:
Express + Socket.io

As it does to the newest:
Tako

Socket.io-Announce

Look ma, no server

Just drop in Announce and broadcast data
directly with your Socket.io connected users!

Socket.io-Announce

var announce = require('socket.io-announce').createClient()
  , symbols = 'THOO GOOF EXIT BOP SDD ALPP RIGM OPPL HPBG'.split(' ')

function dataStream () {
  var n = Math.round(Math.random()*8)
    , data = {
        id: (Math.abs(Math.random() * Math.random() * Date.now() | 0))
      , symbol: symbols[n]
      , price: (Math.random()*1000).toFixed(2)
      , n: n
      }
  announce.emit('quote', data)
}

setInterval(dataStream, 800)
              

Elsewhere, Socket.io Server

var sio = require('socket.io')
  , RedisStore = sio.RedisStore
  , app = connect.createServer(connect.static(path.join(__dirname, './')))
  , settings = { store: new RedisStore({
                  nodeId: function () { return 'socketio-1' }
                }) }
  , io = sio.listen(app, settings);

  app.listen(port);
              

Socket.io Client-side

<script src="/socket.io/socket.io.js"></script>
<script>
  var socket = io.connect()

  socket.on('quote', function (data) {
    $('<span/>', {
        id: data.id,
        html: data.symbol + ' : ' + data.price }).appendTo('#ticker')

    // if the last digit of the prices matches the id, buy.
    var m = ((data.price).match(/[-+]?([0-9]*([0-9]))?\.[0-9]+/))
        , watch = m && m[2];

    if (nodeId && watch == nodeId) {
      $('#'+data.id).addClass('reserved')
      data.buyer = nodeId
      data.quantity = Math.round(Math.random()*5)*5
      socket.emit('purchase', data)
    }
  });
</script>
          

Socket.io-Announce

github.com/dshaw/socket.io-announce

Insanely simple.

Redis is Awesome

You know that.

RedisLive

Monitoring with MONITOR is bad.

The MONITOR command is good and useful for debugging, but not monitoring.

redis.io/commands/monitor

Redis Monitor

Monitor a single Redis or a cluster of Redis servers.

Now visualize what's going on on those servers.

Redis Monitor

Use All The Things

1. Socket.io RedisStore
2. Socket.io-Announce

Redis Monitor

github.com/dshaw/redis-monitor

Demo time!

One More Thing

More, More Realtime

• Socket.io-Zero
  ZeroMQ dispatch and Redis k/v
  github.com/dshaw/socket.io-zero
  
  
• Socket.io-Mongo
  MongoDB store with Mubsub dispatch
  github.com/kof/socket.io-mongo